int init_cache_level()

in kernel/cacheinfo.c [116:156]

• 37 lines of code
• 12 McCabe index (conditional complexity)

int init_cache_level(unsigned int cpu)
{
	struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
	struct device_node *np = of_cpu_device_node_get(cpu);
	struct device_node *prev = NULL;
	int levels = 0, leaves = 0, level;

	if (of_property_read_bool(np, "cache-size"))
		++leaves;
	if (of_property_read_bool(np, "i-cache-size"))
		++leaves;
	if (of_property_read_bool(np, "d-cache-size"))
		++leaves;
	if (leaves > 0)
		levels = 1;

	prev = np;
	while ((np = of_find_next_cache_node(np))) {
		of_node_put(prev);
		prev = np;
		if (!of_device_is_compatible(np, "cache"))
			break;
		if (of_property_read_u32(np, "cache-level", &level))
			break;
		if (level <= levels)
			break;
		if (of_property_read_bool(np, "cache-size"))
			++leaves;
		if (of_property_read_bool(np, "i-cache-size"))
			++leaves;
		if (of_property_read_bool(np, "d-cache-size"))
			++leaves;
		levels = level;
	}

	of_node_put(np);
	this_cpu_ci->num_levels = levels;
	this_cpu_ci->num_leaves = leaves;

	return 0;
}